This rare plant is quite unlike most others, being a tall, woody perennial, much like a taller I. arguta, but with smaller,and more, flowers, with open branches bearing tubular flowers with flattened faces. It flowers from late spring until the end of summer, with a very long succession of flowers, growing well in dry, poor soils, and is very hardy and easy to grow, being probably the longest-lived and most reliably perennial of all of the Incarvilleas.
Seeds can be sown at any time but are best sown in winter or early spring to benefit from a cold spell in the wet compost to break their dormancy. We advise covering seeds very thinly with sand or fine grit to about the depth of the seed size. If the seeds do not come up within 6 to 12 weeks the damp seed tray can be given cold treatment in a fridge for about four weeks. They may still take very many months to appear, so please never discard the pot or tray.